HTTP: Apache HTTP Server Directory Traversal

This signature detects attempts to exploit a known vulnerability against Apache HTTP Server. A successful attack can lead to directory traversal and arbitrary code execution.

Extended Description

A flaw was found in a change made to path normalization in Apache HTTP Server 2.4.49. An attacker could use a path traversal attack to map URLs to files outside the directories configured by Alias-like directives. If files outside of these directories are not protected by the usual default configuration "require all denied", these requests can succeed. If CGI scripts are also enabled for these aliased pathes, this could allow for remote code execution. This issue is known to be exploited in the wild. This issue only affects Apache 2.4.49 and not earlier versions. The fix in Apache HTTP Server 2.4.50 was found to be incomplete, see CVE-2021-42013.

Affected Products

Oracle instantis_enterprisetrack

References

CVE: CVE-2021-42013

URL: https://httpd.apache.org/security/vulnerabilities_24.html

Short Name

HTTP:APACHE:APACHE-PATH-TRAV

Severity

Major

Recommended

True

Recommended Action

Drop

HTTP: Apache HTTP Server Directory Traversal

Extended Description

Affected Products

References

Found a potential security threat?